If the 230K engine is from a facelift car, '98 on I'd imagine it's not practical as there was a host changes between pre facelift and facelift W202's. I can't be more specific than that as I've no direct experience of such a transplant. If you do go for it I reckon possibly the easiest way would to use a standalone engine ECU. Also you'll need to consider brakes and possibly the axle ratio too. If it was me in your shoes I'd simply sell the C180 and buy a 230K/280/C36/C43.